Unrest at Redoubt Volcano continues. No eruption has occurred. Seismicity continues to be dominated by small discrete earthquakes. There have not been any significant earthquake swarms in the past 24 hours. The volcano has been mostly obscured by clouds in web camera and satellite images over the past day.

Since 3:30 PM AKST yesterday, seismicity at Okmok has consisted of tremor bursts at the rate of one to several per hour. This is the same character of seismicity that prompted AVO to raise the color code/alert level to YELLOW/WARNING on March 2.

A caribou-survey flight yesterday flew over Okmok caldera and reported no steaming or other noteworthy surface activity. Clouds have obscured satellite views over the past day.

AVO has received no reports of activity at Cleveland in the past 24 hours. Nothing unusual has been observed in mostly cloudy satellite images over the past day. Low-level ash emissions may occur with little or no warning.

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

VOLCANO ALERT LEVELS

NORMALVolcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.

ADVISORYVolcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

WATCHVolcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.

WARNINGHazardous eruption is imminent, underway, or suspected.

AVIATION COLOR CODES

GREENVolcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.

YELLOWVolcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.

ORANGEVolcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].

REDEruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].